Cydney Posner, Special Counsel

Cydney S. Posner is special counsel in the Cooley Business department and is resident in the Firm's San Francisco office.

Ms. Posner is Co-Chair of the Firm's Public Companies group. Her practice concentrates on corporate counseling in connection with SEC reporting and compliance, corporate governance and general corporate matters. She has also represented both issuers and underwriters in numerous public offerings primarily for emerging growth companies, including companies in the internet and high technology, life sciences and consumer retail sectors. In addition, she has represented companies in mergers, tender offers and other change-of-control transactions, going-private transactions and private placements.

Ms. Posner was recognized as a JD Supra Top Author in the 2016 Readers Choice Awards for her authorship of PubCo @ Cooley, a blog that produces dynamic thought leadership and curated content for the public securities arena.

Ms Posner received a J.D. from the University of California, Hastings College of the Law, cum laude, where she was a member of The Hastings Law Review, and an A.B., with Great Distinction, from the University of California at Berkeley, where she was elected to Phi Beta Kappa.

Ms. Posner is a member of the Bar Association of San Francisco and the State Bar of California.


  • University of California, Hastings College of the Law
  • University of California, Berkeley

Bar Admissions

  • California


  • The Bar Association of San Francisco
San Francisco
101 California Street
5th Floor
San Francisco, California 94111-5800

Phone: +1 415 693 2132
Fax: +1 415 693 2222
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